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Vulnerability record · public intelligence
CVE-2021-21305
HIGH

Code Injection vulnerability in CarrierWave::RMagick

Published Feb 8, 2021 · Updated Nov 3, 2026

Severity · CVSSHIGH · Not scored
Known exploitationNot listed
EPSS / likelihood12.68%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

Code Injection vulnerability in CarrierWave::RMagick

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

[CarrierWave::RMagick](https://github.com/carrierwaveuploader/carrierwave/blob/master/lib/carrierwave/processing/rmagick.rb) has a Code Injection vulnerability. Its `#manipulate!` method inappropriately evals the content of mutation option(`:read`/`:write`), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE).

Potential impact

CarrierWave::RMagick has a Code Injection vulnerability. Its manipulate! method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE). (But supplying untrusted input to the option itself is dangerous even in absence of this vulnerability, since is prone to DoS vulnerability - attackers can try to consume massive amounts of memory by resizing to a very large dimension)

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
MEDIUM
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. GitHub advisory ↗
  2. Source repository ↗
  3. Security advisory ↗
  4. rubygems.org ↗
  5. Patch commit ↗

Record history

Published Feb 8, 2021 · Last refreshed Nov 3, 2026